## CCC '16 J2 - Magic Squares

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Points: 3
Time limit: 2.0s
Memory limit: 256M

Problem type
##### Canadian Computing Competition: 2016 Stage 1, Junior #2

Magic Squares are square arrays of numbers that have the interesting property that the numbers in each column, and in each row, all add up to the same total.

Given a square of numbers, determine if it is a magic square.

#### Input Specification

The input consists of four lines, each line having 4 space-separated integers.

#### Output Specification

Output either magic if the input is a magic square, or not magic if the input is not a magic square.

#### Sample Input 1

16 3 2 13
5 10 11 8
9 6 7 12
4 15 14 1

#### Output for Sample Input 1

magic

#### Explanation for Output for Sample Input 1

Notice that each row adds up to , and each column also adds up to .

#### Sample Input 2

5 10 1 3
10 4 2 3
1 2 8 5
3 3 5 0

#### Output for Sample Input 2

not magic

#### Explanation for Output for Sample Input 2

Notice that the top row adds up to , but the rightmost column adds up to .

• commented on Feb. 22, 2024, 6:20 p.m.

editorial too hard for me.

ez sol: sum row and col and see if they =

skill isue if u cant solve

• commented on Nov. 4, 2023, 2:04 a.m.

This is one of the hardest J2's I have ever done.

• commented on Feb. 13, 2024, 1:07 a.m.

It's actually not that hard if you write many lines.

• commented on Feb. 21, 2024, 6:10 p.m.

Facts

• commented on March 24, 2020, 1:40 a.m.

test cases too weak just need to check rows

• commented on April 15, 2022, 6:58 p.m.

Since the original data were weak, more test cases were added to prevent this solution, and all submissions were rejudged.

• commented on Jan. 15, 2020, 5:03 a.m.

Everyone, if you are using java to solve this question,and having a wa because of "presentation",remember to use System.out.println instead of just print, the grader has some little problem because it is tesing all the case together, so if your out put don't move to the nxt line, what domj grader will see is something like"magicmagicnot magicmagic"

• commented on March 4, 2019, 2:43 p.m. edit 2

this must be the predecessor to what is probably the most controversial CCC problem of all time